The article is devoted to analysis of theological symbols of the famous icon "Trinity" by Andrey Rublev. The researcher pays attention to plural versions interpreted meaning of three figures in the icon which were expressed during many years of researching this masterpiece. Analyzing image content of the icon the author uses additional system of arguments to defend one of versions as only true.

Key words: icon, dogmatic content, theological symbols, mental-vision, composition, version of interpretation.